<form class="layui-form" action="">
    <div class="layui-form-item">
        <label class="layui-form-label">输入框</label>
        <div class="layui-input-block">
            <input type="text" name="title" required lay-verify="required" placeholder="请输入标题" autocomplete="off" class="layui-input">
        </div>
    </div>
    <div class="layui-form-item">
        <label class="layui-form-label">密码框</label>
        <div class="layui-input-inline">
            <input type="password" name="password" required lay-verify="required" placeholder="请输入密码" autocomplete="off" class="layui-input">
        </div>
        <div class="layui-form-mid layui-word-aux">辅助文字</div>
    </div>
    <div class="layui-form-item">
        <label class="layui-form-label">选择框</label>
        <div class="layui-input-block">
            <select name="city" lay-verify="required">
          <option value=""></option>
          <option value="0">北京</option>
          <option value="1">上海</option>
          <option value="2">广州</option>
          <option value="3">深圳</option>
          <option value="4">杭州</option>
        </select>
        </div>
    </div>
    <div class="layui-form-item">
        <label class="layui-form-label">复选框</label>
        <div class="layui-input-block">
            <input type="checkbox" name="like[write]" title="写作">
            <input type="checkbox" name="like[read]" title="阅读" checked>
            <input type="checkbox" name="like[dai]" title="发呆">
        </div>
    </div>
    <div class="layui-form-item">
        <label class="layui-form-label">开关</label>
        <div class="layui-input-block">
            <input type="checkbox" name="switch" lay-skin="switch">
        </div>
    </div>
    <div class="layui-form-item">
        <label class="layui-form-label">单选框</label>
        <div class="layui-input-block">
            <input type="radio" name="sex" value="男" title="男">
            <input type="radio" name="sex" value="女" title="女" checked>
        </div>
    </div>
    <div class="layui-form-item layui-form-text">
        <label class="layui-form-label">文本域</label>
        <div class="layui-input-block">
            <textarea name="desc" placeholder="请输入内容" class="layui-textarea"></textarea>
        </div>
    </div>
    <div class="layui-form-item">
        <div class="layui-input-block">
            <button class="layui-btn" lay-submit lay-filter="formDemo">立即提交</button>
            <button type="reset" class="layui-btn layui-btn-primary">重置</button>
        </div>
    </div>
</form>
<script>
    layui.form.render();

    var form = layui.form;
    form.render();

    form.on('submit(formDemo)', function(data) {
        console.log(data);
        return false;
    });

    console.log(tab);
</script>